Motor vehicles – Compensating devices
Patent
1984-01-23
1985-07-09
Nelli, Raymond A.
Motor vehicles
Compensating devices
180 79, 244223, 244195, 318457, B64C 132, B64C 1304, G06G 766, G05B 1302
Patent
active
045276536
ABSTRACT:
The torque gain of an electric motor assisted power steering system is modified as a function of the estimated level of road load friction such that the relationship between the operator exerted steering torque and the resulting rate of steer is substantially insensitive to a reduction in the level of road load. The road load is estimated as a function of the operator exerted steering torque, the torque assist provided by the electric motor, and the resulting steer rate.
REFERENCES:
patent: 2642554 (1953-06-01), MacCallum
patent: 3618419 (1971-11-01), Maroshick
patent: 3747876 (1973-07-01), Fortna et al.
patent: 3773282 (1973-11-01), Sands et al.
patent: 4071209 (1978-01-01), Hart
patent: 4106728 (1978-08-01), Griffith
patent: 4197577 (1980-04-01), Johnson et al.
patent: 4236685 (1980-12-01), Kissel
Agarwal Paul D.
Fruechte Roger D.
Kade Alexander
Radomski Thomas A.
General Motors Corporation
Navarre Mark A.
Nelli Raymond A.
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